US3454082A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Valve-controlled mixing with upstream heat exchanger
Assignee: Individual
•
Filing: 1967-08-04
•
Granted: 1969-07-08
•
Expires: 1987-08-04
Abstract
No abstract record available.
Inventors
- 👤 Otto Harke
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 00:11
CPC Classifications
F; F28; F28F; F28F3/00; F28F3/08; F28F3/083; F24; F24D; F24D17/00; Y; Y10; Y10S; Y10S165/00; Y10S165/355; Y10S165/356; Y10S165/387; Y10S165/392
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-07-07 | 1973-01-06 | 1973-07-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-07-07 | 1977-01-06 | 1977-07-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-07-07 | 1981-01-06 | 1981-07-08 | $7700.00 | Window Closed / Lapsed |